NC because this is SO outing. I’m actually going to omit a few key details as to try and not make it TOO outing. I’ll also try to condense as much as possible as I hate long threads. 
My parents had me as teenagers. My dad was mostly absent, he is not listed on my birth certificate, and when he was around the only early childhood memories I have are of him and my mum fighting, smashing things, screaming and swearing in my face, calling me a slut (at 11!). My mother worked full time and I spent a lot of time at my grandparents.
My dad moved back in with us when I was a teenager, we moved far far away from my grandparents, family and friends, and they had two more kids. We moved around a few more times and I went to 4 different high schools in the space of three years. My schoolwork suffered beyond repair and I dropped out.
Obviously they were in a much better place, financially, emotionally etc when they had my siblings than when they had me, but I can’t help but feel so jealous of the life they have. They are both late teens now, have had a stable home, never moved schools, both parents present and of sound mind, never had to move away from their friends and family, endless fun OS holidays.. I could go on.
Something inside of me can’t wrap my head around the fact that my biologically full siblings, from the same two parents, have the life that I wanted so badly as a child. My two siblings also have each other and are so close. Something else I always wanted. I was always alone. It just doesn’t seem fair. I’ve tried to talk to my mother about it in recent years and she has pretty much outright told me I’m insane and should seek some counselling. I mean, it’s probably not a bad idea, but am I really crazy to feel this way? She says she did her best, and she probably did. And to be fair we did have some good times when it was just the two of us. But these days I’ve even unfollowed them all on social media because I just can’t bear to see all the happy family snaps.
How do I get over this? 